Deadeye Lightning spear bug

I have two Lightning Spear builds – one is a Bloodmage Rake and the other is a Deadeye Serpent. But for some damn reason, every time I play with the Deadeye, whenever I open a strongbox or chest, I randomly can't attack for a while. If I'm lucky, it fixes itself after taking a Wind Dancer hit. Sometimes I literally have to go back to the character select screen to fix it.

While farming Delirium, without clicking on anything specific, my character just randomly stops attacking in the middle of fights. I can't hit anything. Sometimes it gets fixed after 3-5 dashes, but most of the time it ends with me dying. What the hell is causing this? Is there something I’m missing about this class, or is it a bug?

I’m seriously losing my mind over this – please fix this